Furnace.



G. J. COMNINOS.

FURNACE.

APPLICATION FILED APR. 8, 1914.

1,1 1 3,41 1 Patented Oct. 13, 1914.

2 SHEETB-SHEET 1.

WITNESSES INVENTOR WWQ G. JQGOMNINOS.

FURNACE.

APPLIOATION FILED APR. 8, 1914.

1,1 1 3,41 1. Patented 001;. 13, 1914.

2 SEEBTS-$HEET 2.

INVENTOR mmm Iran STATES PATE T oFrIoe.

GEORGE J. commnos, or rrr'rsnuno i, PENfiSYLVANTAL FURNACE.

To all whom it may concern:

Be it known that I, GEORGE J. CoMNrNos,

a subject of the King of Greece, and residing in the city of Pittsburgh, in the county of Allegheny and State of Pennsylvania,

have invented or discovered new and useful Improvements in Furnaces, of which the following is a specification.

My invention consists of a newand improved hot-air heating furnace intended for use with gaseous fuel.

The object in view is to provide an inexpensive yet durable furnace which willproduce the maximum heating results with the,

expenditure of a minimum of gas.

of an outer cas ng with a heater-body mounted therein, said heater-body oompris' ing a combustion chamber, having mounted therein an annular burner and communicating at its top witha horizontally extending annular fumes chamber from which the products of combustion escape to the chimney, Anair flueextends up through the axis of said burner andsaid combustion chamber into a cylindrical air-chamber formed within sald annular fumes chamber and having one'end' opening intothe interior of the casing while'its other end. receives air from a fresh air pipe extending from without the casing. Flues: extend from said air'chamber through said fumes chamber to discharge the heated air into the upper part of the casing and mixing means are provided in said an chamber to thoroughly mingle the air admitted through the fresh air pipe with the hot air rising through the axial flue. Means are also provided for baffling or retarding the products of combustion as they rise from thecombustion chamber into the fumes chamber.

New and improved means are provided arrangement of parts will appear from the following description.

Specification of Letters Patent. I

Patented 0ct. 13,19 14. I

Application fiiea'a n a, 1914. Serial No. 830,377. l

In the accompanying drawings, Figure 1 is-an elevation, partially broken away and in sectlon, of my improved furnace; Fig. 2

is a view partly in section along] the line II-II in Fig. 1 and also showing the outer wall of the combustion chamber broken 3 is a section Fig. 1

The the drawings: A is the usual outer casing having means for admitting air at the bot-= following is a detailed description of tom, such as pipe -1 and hot-air pipes 2 leading from the top. The heater, contained within the casing, is supported in any Generally speaking my furnace COI1S1StS convenient manner, as for instance by means of the cross bar 3. I v

The structureof the heater is as, follows:

B is a cylindrical combustion chamber,,open at the top andhaving a central opening 4 in which isfixed the upwardlyqextending cylght provided with a cir Srepresents a plurality of'air ports in the v bottom side wall of chamberv B and 9 is an annular shutter mounted to rotate on said chamber and providedwithholes 8 which maybe brought into registration with the ports 8.

10 is a lever rigidly secured to'the shutter 9 and extending out through a horizontal slot 11 in the casing A. Itis evident-that by moving the shutter 9 bymeans of'l'ever '10 the amount of air admitted to the conibustion' chamber may be nicely adjust-ed.

12 is the gas supply pipe leading from without the casing A up through the bottom of the'chamber B into the burner C, the l end of said pipe extending upwardly'some distance into the burner. The discharge end of said pipe is between the inner wall of the burner and an annularbafiie'13 which ex tends in proximityto the outer wall ofthe burner from its top to a short distance-of i the bottom thereof. The burner is thus divided into two concentric chambers, into the inner" one of which the gas isreceived from the pipe 12;and wherein said gas is heated and its pressure increased, and whence the expanded gas passes under the baffle 18 into theouter chamber whence it escapes through the perforations 7.

14: is an inclosed passage leading from the combustion chamber B to the outside of the casing A where it isclosed by the door 15.

16 is the pilot light adjacent to the face of burner C whereby the latter may be lighted when the gas is admitted to'the burner.

D and E are outer and inner concentric drums mounted above the combustion chamber B in the following manner: The outer drum D is provided on its lower side with an orifice provided with a depending neck 17 which rests upon the top of the combustion chamber B and is secured in place, as by the clamping ring 18. The inner drum E is provided with a smaller orifice provided with a neck 19 extending downwardly within the neck 17 and slipping down within an annular flange 20 on the top of the; burner C. It is evident that the air rising up axially of the burner will discharge into the inner drum E while the products of combustion will rise up the neck 17, about the neck 19, into the outer drum D. One end of the inner drum is open to the interior of the casing while its other end is connected with a fresh air pipe 22 leading in through the casing; 23 is a stationary mixing worm in the drum E whose axis may be tube 24 with one open end. It is evident that the hot air rising into the drum through the axial fine is thoroughly intertard the passage of the fumes, said 'bafiie' being perforated as at 28, for the upper half of its upper convolution so that the fumes will escape. evenly around the orifice in drum D. 4

29 is the fume pipe leading from the top of the drum D to without the casing and '30 is the horizontal check-draft lp-ipe provided with a damper 31.

The pipe 1' extends horizontally through the furnace with its ends extending through the casing and screened; At its center it is provided with a vertical open neck 32 ex tending upwardly toa short distance below the lowerend of the axial hot air flue. Along its length said pipe isiprovided with open ports 83 to admit air into the lower casing. Said pipe may if desired be connected to a fresh air supply tube.

34 represents dampers to regulate the ad mission of air into pipe 1.

YVhen the furnace is in use the products of combustion ascend from the combustion chamber through the bafiied neck 17 into the fumes drum D and passing over and around the walls of the air mixing drum E and thence escape through the fume pipe 29 to the chimney. Air enters the pipe 1 and ascends about the heater within the casing to the crown thereof, becoming heated in its passage. Air also passes through the center of the burner and the neck 19 into the airmixing drum E where it mixes with the fresh air from the pipe 22 and the heated mixture escapes into the crown of the easing through the open end of the drum and the fines 25.

It is evident from the foregoing that every advantage is taken of the heat of the products of combustion and the same are baffled and retarded in contact with the walls of the air passages and chambers to obtain the maximum heating effect. abled to economize in the use of gas. No cast metal parts are required, the entire furnace being made of sheet metal. There is thus no extra metal which must be heated and the cost of the furnace is much reduced.

hat I desire to claim is 1. In a furnace, an outer casing; a combustion chamber mounted in the lower portion of said casing; an annular burner I am thus enmounted in said combustion chamber; a horizontally placed annular fumes chamber mounted on said combustion chamber and communicating therewith through an open port, said fumes chamber having a fumes outlet to the exterior of the casing; a circular air-mixing chamber extending axially through said fumes chamber; flues extending through said fumes chamber and connecting said mixing chamber with the crown of the casing, and an air fine extending from the bottom of said casing axially of said burner and said combustion chamber into said mixing chamber.

2. In a furnace, an outer casing; a combustion chamber mounted in the lower portion of said casing; an annular burner mounted in said combustion chamber; a horizontally placed annular fumes chamber mounted on said combustion chamber and communicating therewith through an open port, said fumes chamber having a fume outlet to the exterior of the casing; a circular air-mixing chamber extending axially through said fumes chamber; flues extending through said fumes chamber and connecting said mixing chamber with the crown of said casing, and an air flue .ex-

tending from the bottom. of said casing axially of said burner and said combustion chamber into said mixing chamber, the interior diameter of said last named flue increasing above said burner.

3. In a furnace, an outer'casing, a combustion chamber mounted in the lower portion .of said casing; an annular burner mounted in said combustion chamber; a horizontally placed annular fumes chamber mounted on said combustion chamber and communicating therewith through an open port, said fumes chamber having a fumes outlet to the exterior of the casing; a'circular air-mixing chamber extending axially through said fumes chamber; a fresh air connection for one end of said mixing chamber; fiues extending through said fumes chamber and connecting said mixing chamber with the crown of the casing, and an air flue extending from the bottom of said casing axially of said burner and said combustion chamber into said mixing chamber.

4. In a furnace, bustion chamber into said mixing chamber. tion of said casing; an annular burner mounted in said combustion chamber; a horizontally placed annular fumes chamber mounted on said combustion chamber and communicating therewith through an open port, said fumes chamber having a fumes an outer casing; a combottom of said casing axially of said burner and said combustion chamber into said mix 'ing chamber. a

5. A heater comprising an annular combustion chamber; an air chamber within the same and concentric therewith; an annular burner mounted on top of said air chamber and forming the throat'thereof; an annular fumes drum superimposed upon said combustion chamber and receiving the fumes therefrom through an open port, the open bore of said drum communicating with the throat of said air chamber; inclosed ducts through said drum communicating with said bore, and a fumes pipe leading from said fumes drum.

Signed at- Pittsburgh, Penna. this lth day of April, 1914;.

GEORGE J. COMNINOS. Witnesses:

E. A. LAWRENCE, JOHN MOKELVIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

- Washington, D. 0." 

